[PATCH AUTOSEL 5.4 083/175] selftests/bpf: Fix memory leak in extract_build_id()

[Sasha Levin]

From: Andrii Nakryiko <andr...@fb.com>

[ Upstream commit 9f56bb531a809ecaa7f0ddca61d2cf3adc1cb81a ]

getline() allocates string, which has to be freed.

Fixes: 81f77fd0deeb ("bpf: add selftest for stackmap with BPF_F_STACK_BUILD_ID")
Signed-off-by: Andrii Nakryiko <andr...@fb.com>
Signed-off-by: Alexei Starovoitov <a...@kernel.org>
Cc: Song Liu <songliubrav...@fb.com>
Link: https://lore.kernel.org/bpf/20200429012111.277390-7-andr...@fb.com
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 tools/testing/selftests/bpf/test_progs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/bpf/test_progs.c 
b/tools/testing/selftests/bpf/test_progs.c
index 3bf18364c67c..8cb3469dd11f 100644
--- a/tools/testing/selftests/bpf/test_progs.c
+++ b/tools/testing/selftests/bpf/test_progs.c
@@ -293,6 +293,7 @@ int extract_build_id(char *build_id, size_t size)
                len = size;
        memcpy(build_id, line, len);
        build_id[len] = '\0';
+       free(line);
        return 0;
 err:
        fclose(fp);
-- 
2.25.1